Ambidextrous breathable thumb immobilizing orthosis for tendinitis and osteoarthritis of the thumb, made of elastic fabric with strong compression. Closure system by means of a velcro strap in microgancho. Holds, immobilises and stabilizes. Suitable for tendinitis, painful and inflammatory sequelae, sports injuries (e.g. skier's thumb) and rhizarthrosis of the thumb (osteoarthritis of the joint at the base of the thumb). Ambidextrous, size 1.